SEI MIO - Seated and Mistreated - Unique Under Chair Restraint System

Meet SEI MIO Seated and Mistreated

Got a chair? Then you’ve got a whole new playground. SEI MIO Seated and Mistreated is a clever under chair restraint system that turns everyday seating into a steady, upright restraint setup in minutes. It’s designed to feel secure without feeling harsh, with adjustable straps, padded contact points, and quick release fastenings so you can stay confident, comfortable, and in control of the pace.

What makes SEI MIO Seated and Mistreated special?

Furniture friendly restraint, no tools required

This system sits under the chair, using the chair itself as the anchor. No drilling, no permanent setup, no “where do I store this big thing” problem. It packs down small, sets up fast, and disappears just as easily when you’re done.

Adjustable comfort that still feels seriously secure

The adjustable strap system lets you dial in the fit and tension to match the mood, from teasingly snug to deliciously immobilizing. The goal is a hold that feels steady and intentional, while the padded contact points help keep things comfortable during longer scenes.

Dual D ring anchors for stable positioning

Two metal D ring anchor points give you a reliable base for restraint attachments and position changes. It’s a simple detail that makes a big difference in how balanced and repeatable your setup feels, especially when you want the same “just right” configuration again.

Quick release fastenings for peace of mind

When you’re playing with restraint, easy exit matters. Quick release fastenings help make release fast and straightforward if you need to pause, adjust, or stop. That kind of built in reassurance can make it easier to relax into the moment.

Benefits you’ll feel right away

Seated restraint creates a different vibe than bed based play. It’s intimate, face to face, and full of anticipation. This system keeps things upright and steady, so you can focus on connection, eye contact, and the delicious tension of not being the one calling the shots.

• Upright, engaged positioning that keeps you close, present, and responsive
• Discreet and portable so your setup can be spontaneous and easy to put away
• Customizable restraint intensity with adjustable straps for a better fit and feel
• Comfort focused design with padded contact points to help reduce pressure hot spots
• Confidence boosting safety features like quick release fastenings for fast changes

How to use SEI MIO Seated and Mistreated

1. Choose a sturdy chair with a stable base.
2. Slide the system under the seat so the straps sit neatly beneath the chair.
3. Adjust the straps to fit your preferred positioning and tension. Aim for snug, not numbing.
4. Secure the cuffs/attachment points and check comfort, circulation, and range of motion before you begin.
5. Keep communication clear and agree on a safeword or signal. Then take your time and enjoy the build.

Why choose Sei Mio?

Sei Mio is known for restraint gear that blends real world practicality with playful design. With durable polyester webbing, metal hardware, and a setup that works with ordinary furniture, Seated and Mistreated hits that sweet spot: easy to use, easy to store, and made to support safer, more comfortable restraint play without killing the mood.

Before You Play: Set Up for Comfort & Consent

The SEI MIO Seated and Mistreated Under Chair Restraint System is built for tool-free, on-the-fly chair play—so take 2 minutes to set it up like a pro.

• Choose a stable, non-wheeled chair on a non-slip surface.
• Check you can slide the straps under the seat without twisting them.
• Agree on a safeword (and a simple hand signal) before anyone gets clipped in.

Rule of thumb: restraints should be snug, not biting. Aim for “two fingers” of space to help protect circulation and nerves.

Cleaning (Polyester Webbing, PVC Padding & Metal Hardware)

After each use

• Spot-clean straps and padded areas with warm water + mild soap.
• Wipe metal D-rings and hardware with a damp cloth, then dry.

What to avoid

• Bleach, harsh sprays, or oily cleaners (they can weaken materials and gunk up fastenings).
• Soaking the whole system for long periods.
• Heat drying (radiators, tumble dryers, hair dryers).

Let everything air-dry fully before storage—damp gear is the fastest way to invite smells and wear.

Inspection & Safety Checks (Quick, But Worth It)

Before every session, give it a once-over. This is your “seatbelt check.”

• Look for fraying, cuts, or stretched webbing.
• Check D-rings and metal parts for rust, cracks, or sharp edges.
• Make sure quick-release areas fasten firmly and release smoothly.

If anything looks compromised, retire it. When you’re restraining someone, “probably fine” isn’t the vibe.

Storage (Discreet, Travel-Friendly, Long-Lasting)

• Store clean and dry in a pouch or box away from dust and pet hair.
• Keep out of direct sunlight and high humidity (bathrooms are not ideal).
• Don’t crush the padding under heavy items in a suitcase.

Comfort Tips for Longer Scenes

Because seated restraint should feel delicious—not distracting.

• Use padding where straps meet skin, and re-check snugness after a few minutes.
• Do quick circulation check-ins: warmth, color, tingles, numbness.
• Keep safety shears nearby and stay present—this system is made for shared control.